Authorities say they were among 11 people arrested Monday during a Michigan Coalition Against Tar Sands protest in rural Ingham County. The protesters want to halt Enbridge Inc.’s building of a new line.

Officials initially reported 12 arrests, but later revised the number.

The Calgary, Alberta-based company’s pipeline ruptured in southwestern Michigan in 2010, spilling about 800,000 gallons of oil into a river. The pipeline runs from Sarnia, Ontario, to Griffith, Ind.